Apparatus for manufacturing tire casings



March 10, 1931. A. Q ABBQT-j', JR 1,796,179

APPARATUS FOR MANUFACTURING TIRE CAS'INGS Filed Sept. 24, 1928 A TTORNEY Patented Mar. 10, 1931 UNITED STATES PATENT oFFics ADRIAN O. ABBOTT, JR., OF DETROIT, MICHIGAN, ASSIGNOR TO MORGAN & WRIGHT, OF

DETROIT, MICHIGAN,

consom-.friert er Miniemen Application led September 24, 1928.

This invention relates to a machine for eX- panding automobile tires from the flat pulley band form to the normal tire shape and is an improvement over the device disclosed in my Patent No. 1,507 ,563, granted September.

It is the object of this invention to provide a new and efficient means for forming a seat between the pulley band and the apparatus for expanding the pulley band.

Without intending to limit my invention more than is required by the prior art and with the disclosed embodiment in mind, it consists broadly in providing a pulley band v5.' machine with tubular eXpansible rings positioned at the sides of the casing of the machine, which tubes may be expanded to admitthe pulley band into the machine by introducing air under pressure within the tube, re-

- duction of the air pressure allowing the tubes to vcontract so as to contact with the pull-ey band and `form an airtight seal therewith.

A clear understanding of my invention may be had from the following detailed description and` accompanying drawings in which:

F ig. 1 is an elevation of mymachine; Fig. 2 isa vertical central section through the upperportion oi my machine;

Fig. 3 is a detailed view partly in section showing the construction of the eXpansible tube. Y l y The pulley band 1 iits into the interior of the lannular casing 2 which is made up oi the annular side wall 3, top and bottom end walls 4 and 5 which have aperturestherethrough to provide a central opening 6 through which the pulley band 1 extends. The pulley band 1 lits freely within the cenai' tral opening 6 so that auxiliary means are Serial No. 308,091.

sion along its longitudinal axis but not transversely of the tube7 as for instance by embedding a cord or wire spiral 1S in the walls ci the material. The plates 8 may be secured to the walls l and 5 of the annular casing 2 by posts 8a.

In order to admit the pulley band 1 to the casing 3 the circular tubes 4' may be ez;- panded by introducing air under pressure therein Jfrom the pipe system 9 leading to a suitable source ot pressure. The pipe system 9 is connected to the tubes through the flexible tube 10, the purpose orn which will later appear.

The casing is supported upon the pedestal 11 which also serves as a table upon which the lower edge of the pulley band 1 may rest when irst inserted in the machine.

Suction is applied to the casing 3 through the pine system 12 from any suitable source.

In order to permit the removal of the tire after it has been shaped, the upper end wall 4 is hingedly mounted as indicated at 13 on the side wall 3. A weighted system of levers 14, pivoted to the pedestal 11 as at 15 and to the upper side wall 4las at 16, facilitates lifting of the lid i of the evacuating bex and removal of the shaped tire. rlhe flexible tube 10 connecting the pipe system 9 with the tubes 'l' permits the 'rotation of the upper end wall a with respect to the casing.

In the operation of the machine pressure is applied through the pipe system 9 and tubes 10 to the circular tubes .7 thereby eX- panding them to a position such that the pulleyv band 1' may be more readily inserted within thecasing or boX 2. The pressure act-ingin tubes -7 is then released so that these tubes under their natural elasticity contract so as-to Contact with the pulley band 1 and forma seal therewith.4 Suction is then applied to the interior of the casing or box 3 through the pipe 12 to draw the pulley band from the `liat shape shown in full 'lines in Fig. 1 to Vthe shape shown in dotted lines in 9* the same ligure.` As the pulley band changes shape under the action of the atmospheric pressure the contact between the pulley band and the tubes 7 serves as a seal during the initial changes in shape and the edges of opening' 6 Contact with the pulley band-to form a seal during the last's'tages of the shaping operation. A curing bag or other suitable agency is inserted Within the tire in the usual manner, the upper side Wall opened by means of the systern of: levers 14- and the casing andi` c'ontziined-V curifngff" bag renioved Jfrom the machine. Y

`While one 'speciiie embodiment of my in- Ventieir has beerr-"des'srib'ed in detailietli'er forms of my inventiony snel-i as would oeeur to'l one skilled inthe art are contemplated, and Y for an understanding'of the scope'of my nvention reference should be'made to the following claims.

Having thus I claim and` desire to protect by Letters Patent is: 1

1 l. In apu-lley band expanding Ina-chine ini combination, ant annular easing openV onI its inner periphery and adapted to r'eceryea-pul-` Y ley band therewithinfa' tube on eaeh end-of thefcfasing cir'cuniferen-tially disposed with respeettothe pulley band, and' means for supplying air" pressure lto the tubeto. eX- pand ift;k 'o l Y 2', ln a pulley band expanding machine-in combination, a: rigid/annular easing open along its innerperiphery and ada-ptedto rec'eive-V a pulley bandwithin the inner periph-y f ery, an eX-pansi-ble tube on each end ot the' casi-ng and adapted to surround-thepulley band and form' asealIl-herewith, and meansY for expendingY said tube to admit the `pu-l-ley lnvafpulley expanding machine in 'Combina-tion, a non-collapsible annular eas- Ving open*alongit'sinnerperiphery and adapt edfto receive a-pulleyband Wthi-"n the inner'l periphery, aneXpansi-ble tube'on each end ol the' easing adapted to'v surround the pulley y band andtoform'a'lseal therewithi', sa-i'd tube being expansible longitudinally but' not transversely, and means Jfor expanding said tube toV adniit thepulleyband-.

4.' In a pulley band'- expanding maehine'inn combination,-V a, HHon-collapsible annular Veas- 1n open along-its inner periphery and-adapted toreeeive a pulley band thereWithin, an Veiqbansible tube onv each end ofthe easing arranged tosufrround the pulley band andto fornia vrseal therewithysai'd' tubev having aspirally Wound cord therewithin to permit,

longitudinal expansion and toprevent ,trans- Verse expansion; means for' supplying air uns 1 derlpressure to saidftubes to expand thesanie andrnea-ns for exhausting'the air from the f casing;V

Signed etroit, county of Wayne; of Miohigan, this 18th day of September 1928. Y v y described my invention', whatv ADRIAN" O. ABOTT, JR.`A s 

